8bc5104a6e
When specifying the `builder` attribute in `stdenv.mkDerivation`, this
will be effectively transformed into
builtins.derivation {
builder = stdenv.shell;
args = [ "-e" builder ];
}
This also means that `default-builder.sh` is never sourced and as a
result it's not guaranteed that `$NIX_ATTRS_SH_FILE` is set to a correct
location[1].
Also, we need to source `.attrs.sh` to source `$stdenv`. So, the
following is done now:
* If `$NIX_ATTRS_SH_FILE` points to a correct location, then use it.
Directly using `.attrs.sh` is problematic for `nix-shell(1)` usage
(see previous commit for more context), so prefer the environment
variable if possible.
* Otherwise, if `.attrs.sh` exists, then use it. See [1] for when this
can happen.
* If neither applies, it can be assumed that `__structuredAttrs` is
turned off and thus nothing needs to be done.
[1] It's possible that it doesn't exist at all - in case of Nix 2.3 or
it can point to a wrong location on older Nix versions with a bug in
`__structuredAttrs`.
29 lines
1.2 KiB
Bash
29 lines
1.2 KiB
Bash
if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
|
|
source "${stdenv}/setup"
|
|
echo "exporting ${repository}/${imageName} (tag: ${tag}) into ${out}"
|
|
mkdir -p "${out}"
|
|
|
|
cat <<EOF > "${out}/compositeImage.sh"
|
|
#! ${bash}/bin/bash
|
|
#
|
|
# Create a tar archive of a docker image's layers, docker image config
|
|
# json, manifest.json, and repositories json; this streams directly to
|
|
# stdout and is intended to be used in concert with docker load, i.e:
|
|
#
|
|
# ${out}/compositeImage.sh | docker load
|
|
|
|
# The first character follow the 's' command for sed becomes the
|
|
# delimiter sed will use; this makes the transformation regex easy to
|
|
# read. We feed tar a file listing the files we want in the archive,
|
|
# because the paths are absolute and docker load wants them flattened in
|
|
# the archive, we need to transform all of the paths going in by
|
|
# stripping everything *including* the last solidus so that we end up
|
|
# with the basename of the path.
|
|
${gnutar}/bin/tar \
|
|
--transform='s=.*/==' \
|
|
--transform="s=.*-manifest.json=manifest.json=" \
|
|
--transform="s=.*-repositories=repositories=" \
|
|
-c "${manifest}" "${repositories}" -T "${imageFileStorePaths}"
|
|
EOF
|
|
chmod +x "${out}/compositeImage.sh"
|